604 & HT604 Series 600 The Invincible 600 has a built in solid steel ring locked in place by reinforcement materials at the arch crown. This enables the 600 to handle vacuum conditions in excess of those listed for the 500 in multiple arch joints. Series HT600 The Invincible HT600 has all the construction features…
603 & HT603 Series 600 The Invincible 600 has a built in solid steel ring locked in place by reinforcement materials at the arch crown. This enables the 600 to handle vacuum conditions in excess of those listed for the 500 in multiple arch joints. Series HT600 The Invincible HT600 has all the construction features…
602 & HT602 Series 600 The Invincible 600 has a built in solid steel ring locked in place by reinforcement materials at the arch crown. This enables the 600 to handle vacuum conditions in excess of those listed for the 500 in multiple arch joints. Series HT600 The Invincible HT600 has all the construction features…