1.Q: Are you a factory or trading company? A: We are professional manufacturer, and our company also is a very professional a trade company for steel products.We can provide a wide range of steel products. 2.Q:What do your factory do regarding quality control? A: We have obtained ISO, CE and other certifications. From materials to products, we check every process to maintain good quality. 3.Q: Can I get samples before order ? A: Yes, of course. Usually our samples are free. we can produce by your samples or technical drawings. 4.Q:How do you make our business long-term and good relationship? A:We keep good quality and competitive price to ensure our customers benefit ; We respect every customer as our friend and we sincerely do business and make friends with them.No matter where they come from. 5.Q:what is your delivery time ? A: Our delivery time is about one week, timing according to the number of customers.Section Shape:Round Surface Treatment:Hot Rolled Tolerance:±1% Oiled or Non-oiled:Slightly Oiled Invoicing:by actual weight Alloy Or Not:Non-Alloy Standard:DIN Grade:STEEL Delivery Time:15-21 days Application:Hydraulic Pipe Special Pipe:API Pipe, Thick Wall Pipe Thickness:5 - 100mm Length:12M, 6m Certificate:ISO9001 Processing Service:Cutting Technique:Cold Drawn Secondary Or Not:Non-secondary Name:Hydraulic Cylinder Tube /Honing Seamless Steel Pipe Standard:DIN2391, EN 10305 Certification:ISO9001 Material:ST52, SAE1026, 20# Length:2m-12m ID tolerance:H8 Payment terms:T/T, L/C ID roughness:Ra0.4-0.8Standard:DIN2391, EN 10305, JIS G3445, ASTM A519, GB/T 8713… Material:ST45, ST52, E355, E355SR, STKM13C, SAE 1026, 20#, Q235B, CK45… Heat treatment:BK+S Specification: Out diameter:20-800mm, Inner diameter: 40-250mm I.D Tolerance: H7-H8 Length:3-13m(Customers usually choose the 4-5.8m) Straightness: 1/1000 ID roughness: RA 0.8-1.6micron(max) Technology: Cold drawn Scope:Honed tube for hydraulic cylinder, swivel crane, injection machine and construction machine application