Celebrating 20 years of selling the highest quality parts at the lowest prices. Guaranteed.

"Thank you for the quick response. I've had nothing but good service in the past and will continue to be a customer in the future."

"Thank you again for your help, I really appreciate it and that's why I keep coming back."

"Great site guys! Found everything I needed at a great price!"

"Thanks for the response. We have an inside joke that you guys only hire ninjas with how fast your service is. SIS is definitely the first place I check for parts. You guys have a great thing going on there. Thanks!"

"Simply the best! Keep it up - Thanks!!"

"looking forward to trying your products.haven't dealt much with an fittings and i hope that if i have any questions your company can help me out.your company came well recommended by some good friends of mine."