... KTW,W270,ACS,FDA Itemsilicone shower head gaskets with KTW,ACS, W270 approvalDescriptionSilicone shower head gasketShoreA50,60,70Color:Grey, ... , abrasion resistance etc.SizePowerful design capacity supports various customized shower design. CertificationISO9001-2008, NSF, WRAS, UL, TZW ... standard packing: follow customers' requirement silicone shower head gaskets with KTW,ACS, W270 approval