Yinlong is a professional China based expansion joints manufecturer and the wall sleeves produced by Yinlong can be flexible wall sleeve and rigid wall sleeve with excellent performance.
Flexible Wall Sleeve 
• Made by customers' requirements by standard of S312 or 02S4O4
• Materials:Q235-A
• Type S312
• Professional staff
• Design service
• OEM service
• Discount of large quantity

Rigid Waterproof Sleeve
• Certificate:GB/199901-2000-ISO9001:2000
• Standard: IS09001:2000
• Function: compensator
• Sizedepends on your requirements
• Quantity follows as your order
• Color:depends on your demands
• Advantage:reasonable structure
• Use:widely in many fields
• Price:discount of large quantity
• Quality:high-tech conditions and advanced workers
• Structure :rubber layers and fabric material layers
• Elasticity :compensate for extension and compression

See more at 
http://www.chinarubberexpansionjoint.com/product/Metal_Expansion_Joint/Wall_Sleeves.html
Email: info@yljoint.com