... type. 2.Strengthen cord is stainless steel A)Specification: XL, L, H, XH, T5, T10, T20, AT5, AT10, AT20, 3M, 5M ... with other thermoplastic materials. H)Hard to be hydrolyzed, anti- acid, UV resistant, not aging, highly resistant to oil, anti-grease ... load force. PU Timing Belt, Open End PU Timing Belt (L)