Kale zinc plated hose clamps (W1) made in Europe are for industrial uses or plumbing applications or anywhere when stainless steel is not required.These clamps have a mechanically locked single piece housing for extra strength that can hold high pressure applications. Clamps have a embossed non perforated band that protects hoses. Clamps have a 9mm wide band up to size 20mm and a 12mm wide band for all the larger sizes,the clamps have a 7mm hexagon head screw. Suggested installation torque for 8mm to 20mm clamps is 2.5 N.m, 22mm onwards is 3 N.m. A handy assortment kit is available including all the most popular sizes from 8mm to 60mm diameter,find this kit on this website under assortment or workshop kits part number 3000WK. Plastic safety collars for the hex head screws are available for these clamps in packs of 10 Part Number SC01 also listed on this page.These clamps are direct replacements for Mikalor and Norma Torro type clamps. For user safety see our 3050 series clamp band safety guards. Contact us for a discount code prior to placing your online order or purchase by phone or email.