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

"Great blog! I am loving it!! Will come back again. I am taking your feeds also."

"4th time returning customer thanks guys always good service."

"I ordered a 45 degree angle 2.5 inch diameter coupler and I want to say I am very satisfied with the quality. Fast shipping as well. Thank you."

"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."

"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!"

"It is a pleasure to do business with your company."