Both retailers and brands are realizing that the use of standard needles could lead to damage of the product. 
 
Material: All Steel
Nominal Length: 1.1" (28mm)
Effective Length: 0.35" (9mm)
Outside Diameter: 0.055" (1.4mm)
Shortest Effective Fastener: 0.23" (6mm)
Includes 4 Needles Per Pack